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參數(shù)資料
| 型號： | LM4875M |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 音頻控制 |
| 英文描述： | 750 mW Audio Power Amplifier with DC Volume Control and Headphone Switch |
| 中文描述： | 1 CHANNEL(S), VOLUME CONTROL CIRCUIT, PDSO8 |
| 封裝： | SOIC-8 |
| 文件頁數(shù)： | 10/13頁 |
| 文件大?。?/td> | 673K |
| 代理商： | LM4875M |
Application Information
(Continued)
an external 1k
- 5k
resistor can be placed in parallel with
the internal 20k
resistor. The tradeoff for using this resistor
is increased quiescent current.
RECOMMENDED PRINTED CIRCUIT BOARD LAYOUT
Figure 4
through
Figure 6
show the recommended two-layer
PC board layout that is optimized for the SO-8 packaged
LM4875 and associated external components.
Figure 7
through
Figure 9
show the recommended two-layer PC
board layout for the MSOP packaged LM4875. Both layouts
are designed for use with an external 5V supply, 8
speak-
ers, and 8
- 32
headphones. The schematic for both
recommended PC board layouts is
Figure 1
.
Both circuit boards are easy to use. Apply a 5V supply
voltage and ground to the board’s V
DD
and GND pads,
respectively. Connect a speaker with an 8
minimum imped-
ance between the board’s -OUT and +OUT pads. For head-
phone use, the layout has provisions for a headphone jack,
J1. When a jack is connected as shown, inserting a head-
phone plug automatically switches off the external speaker.
10104238
FIGURE 4. Recommended SO PC board layout:
component side silkscreen
10104239
FIGURE 5. Recommended SO PC board layout:
component side layout
10104240
FIGURE 6. Recommended SO PC board layout:
bottom side layout
L
www.national.com
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM4875M/NOPB | 功能描述:音頻放大器 RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| LM4875MM | 功能描述:音頻放大器 RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| LM4875MM/NOPB | 功能描述:音頻放大器 RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| LM4875MX | 功能描述:音頻放大器 RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| LM4875MX/NOPB | 功能描述:音頻放大器 RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
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